Hypodermic syringe



Jan. 5, 1932. M. NEVIN HYPODERMIC SYRINGE Filed June 6. 1928 INVENTOR UNITED STATES PATENT OFFICE IENDEL NEVIN, F BROOKLYN, NEW YORK HYPDEBMIC SYBINGE Application led June 8, 1928. Serial' No. 283,217.

clamped in place, and the clamping means as uickly and easily released when desired. urther and more specific objects, features and advantages will appear from a consideration of the drawings and the detailed description hereafter set forth, when taken in conjunction with the claims.

Preferred forms of the invention are shown in the drawings, in which Fig. 1 is a longitudinal sectional view 2 through one form, and

Fig. 2 is a partial similar view through another form, and

Fig. 3 is an elevation of the ampule before it is placed in the syrin e barrel.

The form shown in ig. 1 comprises an elongated cylindrical barrel 10 exteriorly threaded at one end to receive a cap 11. The other end of barrel 10 is Vinteriorly threaded to receive a cap or head 12 having an ex- 30 teriorly threaded lug 13 and a iiange 14 abutting the end o the barrel 10. The outer end of cap 12 is provided with an exteriorly threaded extension 15 having a small bore 16 extending throu h to a curved recess or seat 17 on the inner ace of plug 13. This seat 17 is referably provided with a soft cup-shapedru ber lining or resilient packing 18 havmg a central pierced portion 18a, with which the end7 of the ampule is'adapted to make fiuid tight connection. The upper end of this packing 18 is flared out and lies in a groove 45 formed on the innerwall of the barrel 10 and thus the outer edge of the packing is engaged by means on the barrel 8 to securely hold it in position. A needle supporting nut or thimble 19 is interiorly threaded at one end to screw on to extension 15 and has a bore 20 aligned with bore 16. A hollow hypodermic needle 21, having a ball 22 near one end, is disposed in bores 1,6 and 20 with the ball 22 ripped between the end of extension 15 and t e inner face of thimble 19.

The barrel 10 is cut away at 23 to some extent and to a larger extent on the opposite side at 24. Through this larger openin 24, an ampule 25 can readily be inserted. his ampule 25 is a cylindrical container, preferably of glass, having a tapered sealed end 26 and a plug or piston 27 of soft rubber in the other end. The ampule 25 contains anaesthetic medicament 28 which is prepared and placed in the ampule and sealed therein under most stringently antiseptic conditions. When the ampule 25 is to be placed in the barrel 10 preparatory to an injection, the sealed end 26 is broken oi thus opening the lower end of the ampule which is seated on the soft rubber lining 18. The chamber in the barrel 10 to receive the ampule 25 is necessarily of ample dimensions to permit the easy insertion of the ampule 25. Therefore, when the ampule 25 is inserted in place, I provide simple means to engage the upper end of the ampule 25 to hold the lower end 26 irmly on its cushioned seat to make a tight joint at that point.

This ample clampin means may comprise a longitudinally mova 'le member such as a sleeve or plug 29, disposed in the upper end of the barrel and having a stem 30 rovided with exterior threads 31 of prefera l large pitch to engage similar threads on a bore 32 in cap 11. The outer end of stem 30 is provided with a knurled knob 33 to permit manual exterior operation of the plug 29 to advance or retract it with respect t0 the end of ampule 25. The lower end of sleeve or plug 29 has a recess 34 to accommodate the head 35 which is screw threaded on the end of a shaft or iston rod 36 which slidably extends throng bore 37 in sleeve 29 and has an operating handle 38 on its outer end.

Adjacent the end 39 of the sleeve 29 which abuts the end of ampule 25, the sleeve 29 is provided with a depending peripheral rim or iiange 40, extending down the side wall of the ampule the flange being of less length than the ampule, and the inner face of which is downwardly and outwardl beveled or flared and serves to embrace e upper end shown in Fi N u f tti of the ampule 25 to better hold it in place.

When the ampule 25 is thus engagped in operating position` the handle 38 can pushed in, forcing the head 35 on shaft 36 forward l against the piston plug 27 to move it forward in the ampule 25 and expel the medicament 28 through the bore 16 and through the needle 21 as desired.

In the form shown in Fig. 2, the construction of the lower end of the ringe is the same and the upper end only differs, as follows: The barrel is closed by cap 11 through a bore in which piston rod 36 extends and has on its lower end the head 35 adapted, when operated, to press against piston plug 27 and, when withdrawn, to lie in recess 34 in the sleeve 29 which is slidably mounted within the upper end of the barrel 10. This sleeve is advanced or retracted with respect to the upper end of ampule by means of a handle pin 41 thereon, which extends through an inclined or spiral slot 42 in the wall of barrel 10. The lower end of the sleeve 29 is constructed as in Fig. 1. To 25 advance the sleeve 29 the in is moved to one end of slot 42 toward t e other, and to retract it it is moved toward the other end.

When the sleeve or clamping means 29 is advanced by the operation of either means 1 or 2, it will firmly engage the end o ampule 25 to force it lirmly and positively against the packing 18 and lock it positively in position even against back pressure which ma arise when the piston plug 27 is being a vanced to force the medicament 28 out through the needle 21.

Consequently the joint between the lower end of ampule 25 and packing 18 remains tight at all times because of the positive w manual pressure applied to the ampule. This ositive seating o the ampule is in contraistinction to the use of springs or spring pressure to hold the ampule in place, the use of which will not insure a positive tight joint against developed back pressure.

While I have described my improvements in detail and with respect to preferred forms thereof, I do not desire to be limited to such details or forms, since many changes and modifications may be made and the improvements embodied in widely different forms without departing from the spirit and scope of the invention in its broader aspects. Hence I desire to cover all modiications and forms coming within the language or scope of any one or more of the appended claims.

What I claim is:

1. A ge having a barrel and a removable ampule therein, a resilient sheet of packing in the barrel against which the peripheral end of the ampule bears to form a tight joint, said barrel having a groove therein to receive one edge of the packing to hold it in place, and means for ejecting the contents of the ampule.

2. A syringe having a barrel having a side entrance for an ampule a removable ampule in said barrel, a resilient packing in the barrel against which one end of the ampule bears to form a tight joint, said barrel having a groove therein to receive one edge of said plcking, a movable flanged sleeve, the flange ing of less length than the ampule within the barrel abutting the other end of the ampule, and manually o erable means on the outside of the barrel or moving and positively holding said member against the end of the ampule to maintain said tight joint against developed back pressure.

3. A inge having a barrel to receive a removab e ampule with a tapered broken end therein, a head connected to one end of said barrel having a tapered recess, a resilient packing in the end of said barrel lying between said tapered end and said tapered recess, a movable member at the op osite end of the barrel for dispensing the uid from said ampule, means within said barrel for forcing the said am ule against said packing and positively loc ing it thereagainst to provide a leak-tight joint and means externally of said Abarrel for operating the lastnamed means.

4. A syringe having a barrel to receive-an ampule with a tapered end therein, said barrel having a portion shaped to receive said tapered end when broken, a resilient packing shaped like said tapered end and lying between said end when in position and the similarly formed wall of said barrel, a movable member abutting against the opposite end of the ampule when the latter is 1n position, and means operative exterior-ly of the barrel connected to the movable member to move the ampule towards the packing and lock it positively against said packing to form a tight joint.

5. A syrin having a barrel, a removable ampule 1n sald barrel having a tapered open end, a resilient acking in one end of said barrel placed to 11e against the tapered end of said ampule, a movable member at the opposite end of said barrel having a portion abutting the end of the ampule and means operative exteriorly of said barrel and connected to the movable member to move the ampule towards said packing and lock it positively thereagainst.

6. A syringe having a barrel, a removable amfpule in said barrel having a tapered open cu a resilient packing in one end of said barrel laced to lie against the tapered end of saifampule, a rotatable screw-threaded member at the opposite end o said barrel havin a portion abutting the end of the ampua and means operative exteriorly of said barrel and connected to the rotatable member to move the ampule towards said packing and lock is positively thereagainst.

7. A syringe having a barrel, a removable 1,ese,eos

ampule in said barrel having a tapered open end, a resilient packing in one end of said barrel placed to lie against the tapered en d of said ampule, a rotatable screw-threaded member at the opposite end of said barrel having a portion abutting the end of the ampule, said member having a head attached thereto exteriorly of the barrel to be rotated to move the screw-threaded member and thereby the ampule towards the resilient packing and lock its tapered end thereagainst to form a tight joint.

8. A syringe having a barrel, an entrance for an ampule therein, a removable glass ampule having a tapered open end to be placed in said barrel, said barrel having an end portion shaped to receive the tapered end of said ampule, a cup-shaped rubber packing pierced in the center thereof lying in said end of said barrel, the cup being adapted to receive the tapered end of the ampule and to lie between the outer side walls of said ampule and the inner side wall of the head and a rotatable screw-threaded sleevemember cri-operating with the screw threads in the oposte end of the barrel, said sleeve member having a flanged portion surrounding the end of theampule, said sleeve member being provided with a head exteriorly of the barrel to permit manual rotation of said member to advance it and thereby advance the ampule longitudinally of the barrel and to lock it against the rubber cup to make a leak-tight joint. y

In testimony whereof I have signed my name to this specification.

MENDEL NEvIN. 4

ampule in said barrel having a tapered open end, a resilient acking in one end of said barrel placed to e against the tapered en d of .said ampule, a rotatable screw-threaded member at the opposite end of said barrel having a portion abutting the end of the ampule, saidmember having a head attached thereto exteriorly of the barrel to be rotated to move the screw-threaded member and thereby the ampule towards the resilient packing and lock its tapered end thereagainst to form a tight 'oint.

8. A syringe aving a barrel, an entrance for an ampule therein, a removable glass ampule having a tapered open end to be placed in said barrel, said barrel having an end portion shaped to receive the tapered end of said ampule, a cup-shaped rubber packin pierced in the center thereof lying in said en of said barrel, the cup being adapted to receive the tapered end of the ampule and to lie between the outer side walls of said ampule and the inner side wall of the head and a rotatable screw-threaded sleevemember (1o-operating with th screw threads in the oposite end ofthe barrel, said sleeve member having a flanged portion surrounding the end ofatheampule, said sleeve member being provided with a head exteriorly of the barrel to ermit manual rotation of said member to a vance it and thereby advance the ampule longitudinally of the barrel and to lock it against the rubber cup to make a leak-tight joint. y

In testimony whereof I have signed my name to this speciiication.

MENDEL NEVIN.

CERTIFICATE or coRREcTloN.

Patent No. 1, 839, 69s. Granted January s. 1932,10

MaNDEL NEvlN.

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, lines and 6l,

claim l, for the wonls "the peripheral" read one, and line 63; same claim, for "oae"bread the peripheral; same page line 129, claim 6. for "is," read it; and that the said Letters Patent should' be read with these vcorrections therein'that the same may conform to the record of the case in the Patent (mice. l

Signed and sealed this l16th day of February, A. D. 1932.

M. J. `Moore. (Seal) Acting Conmlssiouer of Patente CERTIFICATE 0F CGRRECTIUN.

Patent No. 1,839,695. Granted January S, 1932, to

MENDEL NEVlN.

lt is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, lines 60 and 6l, claim l. for the words "the peripheral" read one, and line 63. same claim1 for "one" Lread the peripheral; same page line |29, claim 6'. for "is," read it; and that the said Letters Patent should be read with these corrections therein that the same may confonn to the record of the case in the Patent Office.

Signed and sealed this 16th day of February, A. D. 1932.

M. J. Moore, (Seal) Acting Coulniasioner of Patents. 

